<template>
  <el-container class="main-container">
    <!-- 头部区域 -->
    <el-header>
      <!-- 左侧的 logo -->
      <img src="../../assets/images/logo.png" alt="" />
      <!-- 右侧的菜单 -->
      <el-menu class="el-menu-top" mode="horizontal" background-color="#23262E" text-color="#fff"
        active-text-color="#409EFF">
        <el-submenu index="1">
          <template slot="title">
            <!-- 头像 -->
            <img v-if='userInfo.user_pic' :src="userInfo.user_pic" alt="" class="avatar" />
            <img v-else src="../../assets/logo.png" alt="" class="avatar" />
            <span>个人中心</span>
          </template>
          <el-menu-item index="1-1">
            <i class="el-icon-s-operation"></i>基本资料
          </el-menu-item>
          <el-menu-item index="1-2">
            <i class="el-icon-camera"></i>更换头像
          </el-menu-item>
          <el-menu-item index="1-3">
            <i class="el-icon-key"></i>重置密码
          </el-menu-item>
        </el-submenu>
        <el-menu-item @click='logout' index="2">
          <i class="el-icon-switch-button"></i>退出
        </el-menu-item>
      </el-menu>
    </el-header>
    <el-container>
      <!-- 侧边栏区域 -->
      <el-aside width="200px">
        <!-- 顶部用户信息 -->
        <div class="user-box">
          <img :src="userInfo && userInfo.user_pic ? userInfo.user_pic : defaultAvatar" alt="" />
          <span>欢迎
            {{userInfo && userInfo.username}}</span>
        </div>
        <!-- 左侧菜单 -->
        <!-- el-menu组件的router属性可以让菜单变成路由的链接 -->
        <el-menu :default-active="$route.path" class="el-menu-vertical-demo"
          background-color="#23262E" text-color="#fff" active-text-color="#409EFF" unique-opened
          router>
          <!-- template标签上面不需要添加key,因为它不会被渲染 -->
          <template v-for='(item, i) in menus'>
            <!-- 菜单选项的index是菜单的唯一身份，并且可以作为路由的链接 -->
            <!-- 不包含子菜单的“一级菜单” -->
            <el-menu-item :key='i' v-if='!item.children' :index="item.indexPath">
              <i class="el-icon-s-tools"></i>主页
            </el-menu-item>
            <!-- 包含子菜单的“一级菜单” -->
            <el-submenu :key='i' v-else :index="item.indexPath">
              <template slot="title">
                <i class="el-icon-s-tools"></i>
                <span>{{item.title}}</span>
              </template>
              <!-- 二级菜单渲染 -->
              <el-menu-item v-for='(menu, n) in item.children' :key='n' :index="menu.indexPath">
                <i :class="menu.icon"></i>{{menu.title}}
              </el-menu-item>
            </el-submenu>
          </template>
        </el-menu>
      </el-aside>
      <el-container>
        <!-- 页面主体区域 -->
        <el-main>
          <router-view>
          </router-view>
        </el-main>
        <!-- 底部 footer 区域 -->
        <el-footer>©
          www.itheima.com
          - 黑马程序员
        </el-footer>
      </el-container>
    </el-container>
  </el-container>
</template>

<script>
import { mapActions, mapState } from 'vuex'
import defaultAvatar from '@/assets/logo.png'

export default {
  name: 'Main',
  data () {
    return {
      // 默认头像
      defaultAvatar,
      menus: []
    }
  },
  computed: {
    ...mapState(['userInfo', 'token'])
  },
  methods: {
    ...mapActions(['getUserInfo']),
    // 获取菜单数据
    async initMenu () {
      const ret = await this.$http.get('/my/menus')
      if (ret.data.code === 0) {
        this.menus = ret.data.data
      }
    },
    logout () {
      // 1. 提示是否退出
      this.$confirm('确认要退出吗?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        // 点击确定触发：清除token
        // 2. 清除token
        this.$store.commit('updateToken', '')
        // 3. 跳转到登录页面
        this.$router.push('/login')
      }).catch(() => {
        // 点击取消触发
        this.$message.info('取消')
      })
    }
  },
  created () {
    // 判断用户是否已经登录
    if (this.token) {
      // 获取用户数据
      // this.$store.dispatch('getUserInfo')
      this.getUserInfo()

      // 获取菜单数据
      this.initMenu()
    } else {
      // 直接跳转到登录页面
      this.$router.push('/login')
    }
  }
}
</script>

<style lang="less" scoped>
.main-container {
  height: 100%;
  .el-header,
  .el-aside {
    .el-submenu,
    .el-menu-item {
      width: 200px;
      user-select: none;
    }
    background-color: #23262e;
    // 左侧边栏用户信息区域
    .user-box {
      height: 70px;
      display: flex;
      justify-content: center;
      align-items: center;
      border-top: 1px solid #000;
      border-bottom: 1px solid #000;
      user-select: none;
      img {
        width: 35px;
        height: 35px;
        border-radius: 50%;
        background-color: #fff;
        margin-right: 15px;
        object-fit: cover;
      }
      span {
        color: white;
        font-size: 12px;
      }
    }
  }
  .el-header {
    padding: 0;
    display: flex;
    justify-content: space-between;
  }
  .el-main {
    overflow-y: scroll;
    height: 0;
    background-color: #f2f2f2;
  }
  .el-footer {
    background-color: #eee;
    font-size: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
  }
}

.avatar {
  border-radius: 50%;
  width: 35px;
  height: 35px;
  background-color: #fff;
  margin-right: 10px;
  object-fit: cover;
}
</style>
